Severity: Warning
Message: fopen(/var/lib/php/sessions/ci_sessionqoi1hrkua0v7pier2vvcbujjhrkdhdhh): failed to open stream: No space left on device
Filename: drivers/Session_files_driver.php
Line Number: 176
Backtrace:
File: /var/www/interviewmania.com/index.php
Line: 315
Function: require_once
Severity: Warning
Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)
Filename: Session/Session.php
Line Number: 143
Backtrace:
File: /var/www/interviewmania.com/index.php
Line: 315
Function: require_once
As we know the formula for two successive discount.
| Equivalent single discount = |  | D1 + D2 − |  | % | |
| 100 |
| Single equivalent discount = | | 30 + 30 − | | % = 51% | |
| 100 |
